TW200518447A - Offset correcting method, offset correcting circuit, and electronic volume - Google Patents

Offset correcting method, offset correcting circuit, and electronic volume

Info

Publication number
TW200518447A
TW200518447A TW093120997A TW93120997A TW200518447A TW 200518447 A TW200518447 A TW 200518447A TW 093120997 A TW093120997 A TW 093120997A TW 93120997 A TW93120997 A TW 93120997A TW 200518447 A TW200518447 A TW 200518447A
Authority
TW
Taiwan
Prior art keywords
offset
offset correcting
unit
electronic volume
correcting circuit
Prior art date
Application number
TW093120997A
Other languages
Chinese (zh)
Other versions
TWI322563B (en
Inventor
Tatsuya Kishii
Original Assignee
Yamaha Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yamaha Corp filed Critical Yamaha Corp
Publication of TW200518447A publication Critical patent/TW200518447A/en
Application granted granted Critical
Publication of TWI322563B publication Critical patent/TWI322563B/en

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/34—Dc amplifiers in which all stages are dc-coupled
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/45—Differential amplifiers
    • H03F3/45071—Differential amplifiers with semiconductor devices only
    • H03F3/45076—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier
    • H03F3/45179—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier using MOSFET transistors as the active amplifying circuit
    • H03F3/45183—Long tailed pairs
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/45—Differential amplifiers
    • H03F3/45071—Differential amplifiers with semiconductor devices only
    • H03F3/45076—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier
    • H03F3/45179—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier using MOSFET transistors as the active amplifying circuit
    • H03F3/45183—Long tailed pairs
    • H03F3/45188—Non-folded cascode stages
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/45—Differential amplifiers
    • H03F3/45071—Differential amplifiers with semiconductor devices only
    • H03F3/45479—Differential amplifiers with semiconductor devices only characterised by the way of common mode signal rejection
    • H03F3/45632—Differential amplifiers with semiconductor devices only characterised by the way of common mode signal rejection in differential amplifiers with FET transistors as the active amplifying circuit
    • H03F3/45744—Differential amplifiers with semiconductor devices only characterised by the way of common mode signal rejection in differential amplifiers with FET transistors as the active amplifying circuit by offset reduction
    • H03F3/45748—Differential amplifiers with semiconductor devices only characterised by the way of common mode signal rejection in differential amplifiers with FET transistors as the active amplifying circuit by offset reduction by using a feedback circuit
    • H03F3/45753—Differential amplifiers with semiconductor devices only characterised by the way of common mode signal rejection in differential amplifiers with FET transistors as the active amplifying circuit by offset reduction by using a feedback circuit using switching means, e.g. sample and hold
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/45—Differential amplifiers
    • H03F3/45071—Differential amplifiers with semiconductor devices only
    • H03F3/45479—Differential amplifiers with semiconductor devices only characterised by the way of common mode signal rejection
    • H03F3/45928—Differential amplifiers with semiconductor devices only characterised by the way of common mode signal rejection using IC blocks as the active amplifying circuit
    • H03F3/45968—Differential amplifiers with semiconductor devices only characterised by the way of common mode signal rejection using IC blocks as the active amplifying circuit by offset reduction
    • H03F3/45973—Differential amplifiers with semiconductor devices only characterised by the way of common mode signal rejection using IC blocks as the active amplifying circuit by offset reduction by using a feedback circuit
    • H03F3/45977—Differential amplifiers with semiconductor devices only characterised by the way of common mode signal rejection using IC blocks as the active amplifying circuit by offset reduction by using a feedback circuit using switching means, e.g. sample and hold
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
    • H03F2203/45—Indexing scheme relating to differential amplifiers
    • H03F2203/45686—Indexing scheme relating to differential amplifiers the LC comprising one or more potentiometers, which are not shunting potentiometers

Abstract

The present invention discloses an offset correcting method, offset correcting circuit, and electronic volume. The offset correcting circuit includes: an amplifying unit including an offset adjusting unit that adjusts an offset of the amplifying unit; and an offset determining unit that outputs a signal to detect and correct the offset of the amplifying unit. The offset determining unit includes a comparing unit that compares an output of the amplifying unit with a reference value, and a counter that increases or decreases a count value in response to an output of the comparing unit. The offset adjusting unit adjusts the offset based on the count value.
TW093120997A 2003-07-14 2004-07-14 Offset correcting method, offset correcting circuit, and electronic volume TWI322563B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003196563A JP4277599B2 (en) 2003-07-14 2003-07-14 Offset correction method, offset correction circuit, and electronic volume

Publications (2)

Publication Number Publication Date
TW200518447A true TW200518447A (en) 2005-06-01
TWI322563B TWI322563B (en) 2010-03-21

Family

ID=34113589

Family Applications (1)

Application Number Title Priority Date Filing Date
TW093120997A TWI322563B (en) 2003-07-14 2004-07-14 Offset correcting method, offset correcting circuit, and electronic volume

Country Status (5)

Country Link
US (2) US7245169B2 (en)
JP (1) JP4277599B2 (en)
KR (1) KR100668537B1 (en)
CN (2) CN2770223Y (en)
TW (1) TWI322563B (en)

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TWI420919B (en) * 2009-12-22 2013-12-21 Hon Hai Prec Ind Co Ltd Volume adjusting system

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JP4824651B2 (en) * 2007-08-28 2011-11-30 ルネサスエレクトロニクス株式会社 Data communication system and receiving circuit offset adjustment method
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CN101834565A (en) * 2010-04-23 2010-09-15 美商威睿电通公司 Signal amplifying circuit and signal amplifying method
JP5624493B2 (en) * 2011-02-16 2014-11-12 キヤノン株式会社 Differential amplifier
CN102645943B (en) * 2012-04-24 2015-09-09 华为技术有限公司 Stochastic error voltage processing circuitry and amplifier device
JP5894869B2 (en) * 2012-06-21 2016-03-30 株式会社日立製作所 Transimpedance amplifier
TWI505724B (en) * 2013-06-10 2015-10-21 Princeton Technology Corp Gain controlling system, sound playback system, and gain controlling method thereof
CN103616919B (en) * 2013-12-12 2016-03-23 杭州士兰微电子股份有限公司 Wheatstone bridge configuration and adjustment method thereof
KR20150069936A (en) 2013-12-16 2015-06-24 현대자동차주식회사 Offset correction apparatus for differential amplifier and method thereof
JP6307980B2 (en) * 2014-03-31 2018-04-11 株式会社ソシオネクスト Differential amplifier circuit and semiconductor integrated circuit
TWI535193B (en) * 2014-07-10 2016-05-21 晶致半導體股份有限公司 Auto calibration driver device and itsapplication wireless charger driver system
JP6357241B2 (en) * 2014-10-03 2018-07-11 パイオニア株式会社 Offset voltage monitoring apparatus and offset voltage monitoring method
CN107370463B (en) * 2017-06-15 2023-09-01 西安华泰半导体科技有限公司 Offset self-correction operational amplifier based on back gate effect and channel length modulation effect
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Publication number Priority date Publication date Assignee Title
TWI420919B (en) * 2009-12-22 2013-12-21 Hon Hai Prec Ind Co Ltd Volume adjusting system

Also Published As

Publication number Publication date
US20070247208A1 (en) 2007-10-25
CN2770223Y (en) 2006-04-05
CN1578122A (en) 2005-02-09
JP2005033541A (en) 2005-02-03
KR100668537B1 (en) 2007-01-16
US7245169B2 (en) 2007-07-17
JP4277599B2 (en) 2009-06-10
US7554376B2 (en) 2009-06-30
CN1578122B (en) 2010-05-05
US20050030081A1 (en) 2005-02-10
TWI322563B (en) 2010-03-21
KR20050008524A (en) 2005-01-21

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MM4A Annulment or lapse of patent due to non-payment of fees